Not to be confused with Luigi's final smash.
The Negative Zone Machine is a corrupted Mr. Coffee that Ruigi made with Kinopio-Kun whilst playing Pokemon Laggray. Apparently the link cable got too hot and both connections disconnected simultaneously.
CustodyAfter the Negative Zone Machine was created, both Ruigi and Kinopio-Kun wanted it and got a trial as quickly as they could. WaNess decided that it was an imported coffee machine and that Japanese people couldn't have it. And in 2007 Luigi got it, but he didn't like the negative zone it gave him. Ruigi bought if off Luigi for ¥1000.
Death of Sans Undertale Jr.
TodayRuigi currently owns the Negative Machine and plans using the Tinkerer's Workshop to combine the Wa-Machine and Negative Zone Machine to create the "WaNegative Zone Machine" (could also be referred to "enihcaM-aW")
If something has been CTRL+S'd by the Negative Zone Machine, than it cannot come back in it's original state, even if it done again. But it's okay if you just temporarily use the Negative Zone Machine on something.